Description

L-Methylcysteine Hydrochloride is a high-purity, non-natural amino acid derivative widely utilized in pharmaceutical research and development. This compound serves as a critical chiral building block and intermediate for synthesizing novel therapeutic agents and bioactive molecules. It is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and fine chemical sectors seeking reliable, high-quality raw materials for advanced synthesis.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of potential drug candidates, particularly in oncology and metabolic disease research.
• Peptide Synthesis: Used in solid-phase and solution-phase peptide chemistry to incorporate modified cysteine residues, influencing peptide structure and stability.
• Biochemical Research: Employed as a substrate or inhibitor in enzymatic studies to investigate metabolic pathways involving sulfur-containing amino acids.
• Prodrug Development: Acts as a carrier moiety in prodrug design to improve drug solubility, bioavailability, or targeting.
• Reference Standard: Serves as an analytical standard in quality control laboratories for method development and validation.
• Cosmetic Ingredient: Explored for use in advanced skincare formulations for its potential antioxidant properties.

Basic Information

Product Name	L-Methylcysteine Hydrochloride
CAS No.	403804-61-5
Molecular Formula	C4H9NO2S • HCl
Molecular Weight	171.64 g/mol
Synonyms	(2R)-2-Amino-2-methyl-3-sulfanylpropanoic acid hydrochloride; L-2-Amino-2-methyl-3-mercaptopropionic acid hydrochloride; (R)-2-Amino-2-methyl-3-mercaptopropanoic acid hydrochloride; L-α-Methylcysteine hydrochloride; L-β-Mercivo-α-aminoisobutyric acid hydrochloride; L-Mecysteine hydrochloride; L-2-Methylcysteine HCl
EINECS	Contact for details

Quality Control

Our L-Methylcysteine Hydrochloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and residual solvent screening, to ensure it meets stringent specifications for research and cGMP applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥98.0%
Optical Rotation	[α]²⁰D: Specific range available
Chiral Purity (HPLC)	≥99.0%
Loss on Drying	≤1.0%
Residue on Ignition	≤0.1%
Heavy Metals	≤20 ppm
Residual Solvents (GC)	Meets ICH guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.